Which of the following equations is balanced?A.Na2SO4(aq) + CaCl2(aq) CaSO4(s) + NaCl(aq)B.2Na2SO4(aq) + CaCl2(aq) CaSO4(s) + 2NaCl(aq)C.Na2SO4(aq) + 2CaCl2(aq) CaSO4(s) + NaCl(aq)D.Na2SO4(aq) + CaCl2(aq) CaSO4(s) + 2NaCl(aq)SUBMITarrow_backPREVIOUS
Question
Which of the following equations is balanced?A.Na2SO4(aq) + CaCl2(aq) CaSO4(s) + NaCl(aq)B.2Na2SO4(aq) + CaCl2(aq) CaSO4(s) + 2NaCl(aq)C.Na2SO4(aq) + 2CaCl2(aq) CaSO4(s) + NaCl(aq)D.Na2SO4(aq) + CaCl2(aq) CaSO4(s) + 2NaCl(aq)SUBMITarrow_backPREVIOUS
Solution
The balanced equation is D. Na2SO4(aq) + CaCl2(aq) -> CaSO4(s) + 2NaCl(aq).
Here's the step by step process:
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Look at the number of atoms for each element on both sides of the equation.
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For equation A, there are 2 sodium atoms on the left but only 1 on the right, so it's not balanced.
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For equation B, there are 4 sodium atoms on the left but only 2 on the right, so it's not balanced.
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For equation C, there are 2 sodium atoms on the left but only 1 on the right, and 2 calcium atoms on the left but only 1 on the right, so it's not balanced.
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For equation D, there are 2 sodium atoms on both sides, 1 calcium atom on both sides, 4 chlorine atoms on both sides, 1 sulfur atom on both sides, and 4 oxygen atoms on both sides. Therefore, equation D is balanced.
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